package com.foreknow.controller;

import com.foreknow.bean.Guestbook;
import com.foreknow.service.GuestbookService;
import com.foreknow.service.impl.GuestbookServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Iterator;
import java.util.List;

public class ManageServlet  extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //我们只需 要在doGet中获取到请求的参数q=list，然后根据获取到的参数来决定调用哪一个方法
        String method = req.getParameter("q");
        if("delete".equals(method)) {
            delete(req,resp);
        }else if("update".equals(method)){
            update(req,resp);
        }else if("addMessage".equals(method)){
            addMessage(req,resp);
        }else {
            list(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }

    //查询所有信息的方法
    protected void list(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        GuestbookService service = new GuestbookServiceImpl();
        List<Object> list = service.getQueryAll();
        //将查询到的list集合保存到服务器端
        req.setAttribute("list",list);
        //之后就可以将这个请求转发给list.jsp
        req.getRequestDispatcher("/list.jsp").forward(req,resp);
    }

    //删除
    protected void delete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        Integer id = Integer.parseInt(req.getParameter("id"));
        GuestbookService service = new GuestbookServiceImpl();
        service.delete(id);
        list(req,resp);
    }

    //修改
    protected void update(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    }

    //添加
    protected void addMessage(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        Guestbook guestbook = new Guestbook();
        guestbook.setName(req.getParameter("name"));
        guestbook.setEmail(req.getParameter("email"));
        guestbook.setPhone(req.getParameter("phone"));
        guestbook.setTitle(req.getParameter("title"));
        guestbook.setContent(req.getParameter("content"));
        LocalDate date = LocalDate.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy");
        guestbook.setCreatedtime(date.format(formatter));
        GuestbookService service = new GuestbookServiceImpl();
        service.add(guestbook);
        list(req,resp);
    }

}
